I treat as C. banksi a long series of specimens that are otherwise morphologically very similar, but vary dramatically in body color, ranging from those with a fair proportion of orange/brown to others that are almost completely black. More research is required to determine if these specimens do indeed represent a single species with highly variable coloration, or a complex of species.

Howard, L.O. 1881. (in Comstock, J.H. – Report of the entomologist for 1880). Part III. Report of the parasites of Coccidae in the collection of the U.S. Department of Agriculture. Report. United States Department of Agriculture. Washington. (Entomology). 1880: 350-374.

Howard, L.O. 1885. Descriptions of North American Chalcididae from the collections of the U.S. Department of Agriculture and of Dr. C.V. Riley, with biological notes. (First paper). Together with a list of the described North American species of the family. Bulletin of the United States Department of Agriculture, Bureau of Entomology5: 44 pp.

Howard, L.O. 1898. On some new parasitic insects of the subfamily Encyrtinae. Proceedings of the United States National Museum21: 231-248.